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2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)最新文献

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High density coverage investigation of The Austre LovénBreen (Svalbard) using Ground Penetrating Radar 利用探地雷达对斯瓦尔巴群岛的奥斯特洛夫萨姆布林进行高密度覆盖调查
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963894
A. Saintenoy, J. Friedt, F. Tolle, E. Bernard, D. Laffly, C. Marlin, M. Griselin
{"title":"High density coverage investigation of The Austre LovénBreen (Svalbard) using Ground Penetrating Radar","authors":"A. Saintenoy, J. Friedt, F. Tolle, E. Bernard, D. Laffly, C. Marlin, M. Griselin","doi":"10.1109/IWAGPR.2011.5963894","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963894","url":null,"abstract":"A three week field survey over April 2010 allowed for the acquisition of 120 Ground Penetrating Radar (GPR) profiles, adding to a 40 km long walk across an Arctic glacier. The profiles were acquired using a Malå equipment with 100 MHz antennas, walking slowly enough to record a 2.224 µs trace every 30 cm on the average. Some acquisitions were repeated with 50 MHz or 200 MHz antenna to improve data quality. The GPR was coupled to a GPS system to position traces. Each profile has been manually edited using standard GPR data processing, to pick the reflection arrival time from the ice-bedrock interface. Travel-times were converted to ice thickness using a velocity of 0.17 m/ns. Dual-frequency GPS mapping and snow coverage thickness were acquired during the same survey. Using interpolation methods, we derived the underlying bedrock topography and evaluated the ice volume.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127182547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Development of a real-time georeferenced subsurface radar system for mining applications 采矿用实时地理参考地下雷达系统的研制
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963890
A. Strange, J. Ralston
{"title":"Development of a real-time georeferenced subsurface radar system for mining applications","authors":"A. Strange, J. Ralston","doi":"10.1109/IWAGPR.2011.5963890","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963890","url":null,"abstract":"The paper describes the development of a new integrated sensing system that provides real-time, georeferenced subsurface information for enhancing mining equipment operation. The system incorporates subsurface radar sensing, pose estimation, embedded computing, custom processing algorithms, wireless Ethernet, and advanced 3D visualization to provide a unique real-time sensing capability. Details on the implementation architecture are given with an emphasis on the need for real-time, multi-sensor synchronization for accurate position estimation. Practical deployment of the sensing system on a mobility platform is described to demonstrate the potential value of the system for mining and related applications.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128247476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Identifying sedimentary structures and spatial distribution of tsunami deposits with GPR - examples from Spain and Greece 用探地雷达识别海啸沉积物的沉积构造和空间分布——以西班牙和希腊为例
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963850
B. Koster, K. Reicherter, Andreas Vott, C. Grutzner
{"title":"Identifying sedimentary structures and spatial distribution of tsunami deposits with GPR - examples from Spain and Greece","authors":"B. Koster, K. Reicherter, Andreas Vott, C. Grutzner","doi":"10.1109/IWAGPR.2011.5963850","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963850","url":null,"abstract":"Shallow drilling in coastal areas like southern Spain and different parts of Greece (Corinth region and Argolis Gulf) proved evidence for tsunamis. Sedimentary analyses were conducted to identify tsunamigenic deposits, but did not reveal sedimentary structures or spatial distribution of tsunamites in a regional scale. Since drilling is time-intensive and expensive (depending on extend), this method can by far not cover an entire coastal area. On the other hand, distribution and preservation of tsunamigenic deposits seems to be highly variable. We used ground penetrating radar (GPR) in combination with electrical resistivity tomography (ERT) measurements and sedimentological research methods for tsunamite detection in Greece and Spain. The combination of these three methods enables an improved interpretation of the results and 3D visualization, which give clues for tsunamite distribution and sediment architecture. GPR data indicate unconformable thicknesses of tsunamigenic beddings, channel-like structures (back wash deposits), in some extent chaotic erosion basement, as well as abrasion-scours in various places, and boulder accumulation inside the deposits. In the future, GPR and other shallow geophysical methods will be used to detect run-up distances and typical sediment structures.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125596528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
GPR analysis of a masonry arch for structural assessment 某砌体拱顶结构评估的探地雷达分析
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963873
M. Solla, Carlos Caamaño, B. Riveiro, H. Lorenzo
{"title":"GPR analysis of a masonry arch for structural assessment","authors":"M. Solla, Carlos Caamaño, B. Riveiro, H. Lorenzo","doi":"10.1109/IWAGPR.2011.5963873","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963873","url":null,"abstract":"Many of masonry arch bridges are ancient structures still in use within the transportation infrastructure, and they require a constant diagnosis of their structural integrity. In the last decades, non-destructive testing has been recommended for evaluation in order to preserve their historical character. In this work, a multidisciplinary approach to assess masonry arches is presented. A GPR survey of the Cernadela bridge was carried out using the 250, 500 and 800 MHz antennas. The main goal was to obtain relevant unknown parameters such as the inner ring stone thickness of arches for later structural analysis by analytical modelling. Photogrammetric methods were also employed in order to provide the precise external geometry of the bridge. Results show that it is possible to determine the ring stone thickness, which can be valuable information for engineers in order to perform an exhaustive assessment of the load carrying capacity of the bridge.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133381835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Numerical evaluation of a full-wave antenna model for near-field applications 近场全波天线模型的数值评价
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.3997/1873-0604.2012052
A. Tran, C. Warren, F. André, S. Lambot
{"title":"Numerical evaluation of a full-wave antenna model for near-field applications","authors":"A. Tran, C. Warren, F. André, S. Lambot","doi":"10.3997/1873-0604.2012052","DOIUrl":"https://doi.org/10.3997/1873-0604.2012052","url":null,"abstract":"In this study, we numerically evaluated a full-wave antenna model for near-field conditions using GprMax3D. The antenna is effectively characterized by a series of source and field points and global reflection/transmission coefficients, which enables us to take the maximum benefit of using analytical solutions of Maxwell' equations to noticeably reduce computation time compared to the numerical approach. The full-wave GPR model was calibrated by a series of numerical experiments above an infinite perfect electrical conductor (PEC). The calibration results provided a very good agreement with GprMax3D modeled data with a correlation coefficient of approximately 0.9995. Afterwards, the model was applied to estimate the dielectric permittivity and conductivity of an artificial medium based on GPR data obtained from the GprMax3D model. Full-wave inversion provided quite accurate estimations. The average relative errors of the dielectric permittivity and conductivity were lower than 0.28% and 11.5%, respectively. Our modeling approach shows a great potential to apply full-wave inversion for characterizing the electrical properties of the subsurface from near- and far-field radar measurements.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133551057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Combined effective wavelet estimation and full-waveform inversion of GPR data 有效小波估计与探地雷达全波形反演相结合
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963885
S. Busch, J. van der Kruk, J. Bikowski, H. Vereecken
{"title":"Combined effective wavelet estimation and full-waveform inversion of GPR data","authors":"S. Busch, J. van der Kruk, J. Bikowski, H. Vereecken","doi":"10.1109/IWAGPR.2011.5963885","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963885","url":null,"abstract":"Full-waveform inversion uses all information content of the measured data, which leads to higher resolution images compared to standard ray-based techniques. We developed a full-waveform inversion scheme for common-midpoint (CMP) GPR data that is based on a frequency domain solution of Maxwell's equations assuming a layered model of the subsurface. The full-waveform inversion requires a good start model of the subsurface medium parameters; permittivity and conductivity, which mainly influence the velocity and amplitudes, respectively. Traveltime inversion usually returns start values for the relative permittivity. However, reliable conductivity values are difficult to obtain. Erroneous conductivity values result in wrong amplitudes of the effective source wavelet that is needed for the full-waveform inversion, which in turn also results in erroneously inverted conductivity values, since the conductivity and wavelet amplitudes are coupled. To assure a good start model and an accurate estimation of the unknown source wavelet, we implemented a joint optimization of the effective source wavelet and the medium parameters using a combined global and local search algorithm. The full-waveform inversion was successfully applied to dispersive synthetic and experimental CMP datasets reflecting a single-layer low-velocity waveguide.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127058482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Dielectric measurements of saline ices: Implications for jovian satellites radar exploration 盐冰的介电测量:对类木卫星雷达探测的启示
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963882
M. D. de Santis, S. Lauro, E. Mattei, B. Cosciotti, E. Pettinelli, G. Vannaroni
{"title":"Dielectric measurements of saline ices: Implications for jovian satellites radar exploration","authors":"M. D. de Santis, S. Lauro, E. Mattei, B. Cosciotti, E. Pettinelli, G. Vannaroni","doi":"10.1109/IWAGPR.2011.5963882","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963882","url":null,"abstract":"A spacecraft in orbit around Jupiter's moon Ganimede can use ice penetrating radar to probe for a possible liquid water ocean beneath Ganimede's surface ice. The success of such a mission is constrained to the electromagnetic properties of ice, possible subsurface temperature gradients, and possible impurities in the ice. Several saline ice samples were analyzed using Time Domain Reflectometry technique to extract the electrical permittivity and conductivity as function of temperature, from 20°C to -30°C.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123836029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-destructive characterization of maritime pine sawn timber dielectric anisotropy by means of GPR 海松锯材介电各向异性的探地雷达无损表征
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963860
I. Rodriguez-Abad, R. Martinez-Sala, F. Garcia-Garcia, R. Capuz-Lladro, R. Diez Barra
{"title":"Non-destructive characterization of maritime pine sawn timber dielectric anisotropy by means of GPR","authors":"I. Rodriguez-Abad, R. Martinez-Sala, F. Garcia-Garcia, R. Capuz-Lladro, R. Diez Barra","doi":"10.1109/IWAGPR.2011.5963860","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963860","url":null,"abstract":"The dielectric response of timber to electrical fields is influenced by many factors, one of the most important being the internal structure of the wood. Thus the anisotropy of the wood should be taken into account when the ground-penetrating radar (GPR) technique is used to explore the properties of timber. The work carried out analyzes, by means of a GPR with a 1.6 GHz antenna, the dielectric behavior of Maritime Pine timber according to the direction of the electrical field with respect to the grain. After the acquisition process, the propagation velocities, amplitudes, and spectra variations were compared for all the studied grain directions. Significant differences were found between these parameters when the field was propagated in a parallel direction compared with perpendicular to the grain. However, when the field was propagated in various perpendicular directions to the grain (radial & tangential) the studied parameters were not found to differ greatly.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115839419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Extraction of the frequency variation of the complex permittivity using GPR 利用探地雷达提取复介电常数的频率变化
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963903
A. Ihamouten, Xavier Dérobert, G. Villain
{"title":"Extraction of the frequency variation of the complex permittivity using GPR","authors":"A. Ihamouten, Xavier Dérobert, G. Villain","doi":"10.1109/IWAGPR.2011.5963903","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963903","url":null,"abstract":"The objective of this paper is to present an innovative technique for the extraction of the electromagnetic dispersion of civil engineering materials using GPR. This technique is based on a coupling between modified forms of the two-dimensional Fourier transform and a method for the quality factor estimation. It allows identifying the material dispersion phenomena as a variation of the complex permittivity in function of frequency. For each method, an analytical validation is first carried out on simulated propagation signals (generated from one of the Jonscher's model variants). Second, the radar data collected with the Wide-Angle Reflection and Refraction (WARR) multi-offset geometry were used for experimental validation on limestone and concrete slabs. The complex permittivity obtained by this “inter-method coupling” was compared with that obtained by the semi-destructive measurements using a cylindrical transmission line which is considered as the reference.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123332342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
GPR profiling and electrical resistivity tomography for buried cavity detection: A test site at the abbaye de l'Ouye (France) 地下空腔探测用GPR剖面和电阻率层析成像:abbaye de l'Ouye的一个试验场(法国)
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963852
N. Boubaki, A. Saintenoy, P. Tucholka
{"title":"GPR profiling and electrical resistivity tomography for buried cavity detection: A test site at the abbaye de l'Ouye (France)","authors":"N. Boubaki, A. Saintenoy, P. Tucholka","doi":"10.1109/IWAGPR.2011.5963852","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963852","url":null,"abstract":"The abbaye de l'Ouye (France) presents an underground room situated under a flat graveled path perfect for testing the complementarity of two geophysical methods, ground-penetrating radar (GPR) and electrical resistivity tomography (ERT), for buried cavity detection. One GPR mono-offset profile was acquired along with a 2D ERT profile on the surface above the cavity of known dimensions. We use our field site to test 2D ERT data acquisition and inversion parameters and how to complete GPR data information with ERT and vice-versa. As expected the mono-offset GPR profile contains strong reflections on the ceiling and the floor of the room. Arrival times of those reflections are translated to depth using classical GPR data processing techniques. The measured electrical apparent resistivities were inverted using the Loke (2001) software with three different options: i) no a priori information, ii) a priori information included as high resistivity value in an area determined from the GPR reflections, iii) a priori information included as boundary positions derived from the GPR reflections.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129108428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
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